On Wednesday, a dozen relatives of murder victims gave impact statements in court, calling Bulger a "terrorist," a "punk" and even "Satan." Bulger sat stone-faced and refused to look at them or to make a statement of his own.

The son of a man who was gunned down by Bulger in 1974 addressed Bulger as "Satan" and described how his father, a member of a rival gang, first disappeared in 1974 but wasn't found until decades later when his body was discovered in a watery grave.

Sean McGonagle was 11 when his father, Paul, disappeared. He said Bulger called his family's house the following year and said, "Your father won't be coming home for Christmas." When he asked, "Who's this?" Bulger responded, "Santa Claus," McGonagle said.

Several family members blasted corrupt FBI agents for protecting Bulger for years while he was working simultaneously as a crime boss and an FBI informant who ratted out the rival New England Mafia and other crime groups.

David Wheeler, the son of a Tulsa, Okla., businessman who was shot between the eyes by a hit man for Bulger's gang, delivered a blistering condemnation of both the FBI and the Justice Department, which successfully argued to have his family's wrongful death lawsuit dismissed on the grounds that it was filed too late.

"They are as responsible for that murder as the defendant here sitting before you," Wheeler said.

New Hampshire attorney Bill Christie has represented the families of two of Bulger's victims. He said the sentencing was an important event for his clients, one they worried might never happen.

"The fact that Bulger has been apprehended and convicted and sentenced to life, I think there is some psychic sense of justice there," Christie said.

Christie represented the Halloran and McIntyre families in a wrongful death lawsuit against the federal government. He said Bulger's sentencing will continue their healing process, but they can never put it behind them.

"I think it's something my clients they think about every day," Christie said. "One of my clients, she had her husband gunned down on the streets of Boston. Another client, her son was kidnapped and brutally tortured before he was killed."

Former Boston FBI agent John Connolly Jr. -- Bulger's handler when he was an informant -- was sentenced to 10 years in prison after being convicted of tipping the gangster off ahead of an indictment. After receiving the tip in 1994, Bulger fled Boston and remained a fugitive for more than 16 years until he was captured in Santa Monica, Calif., in 2011. Connolly was later convicted of second-degree murder in Florida for leaking information to Bulger that led to the slaying of a gambling executive.

Christie said the government could do one more thing to help the families of Bulger's victims.

"I mean, to this day, people are still waiting for a simple apology, and there has been none," he said. "The government has still refused to admit it did anything wrong."

Bulger claimed during his trial that a now-deceased federal prosecutor had given him immunity to commit crimes in exchange for Bulger's offer to protect him from the Mafia. The judge refused to allow Bulger to use that claim as a defense to his long list of crimes, including murders.

A jury convicted Bulger in 11 out of the 19 killings he was charged with participating in during the 1970s and '80s but acquitted him of seven killings and issued a "no finding" in the murder of 26-year-old Debra Davis, the girlfriend of his former partner, Stephen "The Rifleman" Flemmi.

Whitey Bulger photos: Timeline of crime

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FBI

James Bulger was first arrested in 1943, at the age of 14, for larceny.